libsanitizer/lsan/lsan.cc

   1 //=-- lsan.cc -------------------------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of LeakSanitizer.
   9 // Standalone LSan RTL.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "lsan.h"
  14
  15 #include "sanitizer_common/sanitizer_flags.h"
  16 #include "sanitizer_common/sanitizer_flag_parser.h"
  17 #include "sanitizer_common/sanitizer_stacktrace.h"
  18 #include "lsan_allocator.h"
  19 #include "lsan_common.h"
  20 #include "lsan_thread.h"
  21
  22 bool lsan_inited;
  23 bool lsan_init_is_running;
  24
  25 namespace __lsan {
  26
  27 ///// Interface to the common LSan module. /////
  28 bool WordIsPoisoned(uptr addr) {
  29   return false;
  30 }
  31
  32 }  // namespace __lsan
  33
  34 using namespace __lsan;  // NOLINT
  35
  36 static void InitializeFlags() {
  37   // Set all the default values.
  38   SetCommonFlagsDefaults();
  39   {
  40     CommonFlags cf;
  41     cf.CopyFrom(*common_flags());
  42     cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
  43     cf.malloc_context_size = 30;
  44     cf.detect_leaks = true;
  45     cf.exitcode = 23;
  46     OverrideCommonFlags(cf);
  47   }
  48
  49   Flags *f = flags();
  50   f->SetDefaults();
  51
  52   FlagParser parser;
  53   RegisterLsanFlags(&parser, f);
  54   RegisterCommonFlags(&parser);
  55
  56   parser.ParseString(GetEnv("LSAN_OPTIONS"));
  57
  58   SetVerbosity(common_flags()->verbosity);
  59
  60   if (Verbosity()) ReportUnrecognizedFlags();
  61
  62   if (common_flags()->help) parser.PrintFlagDescriptions();
  63 }
  64
  65 extern "C" void __lsan_init() {
  66   CHECK(!lsan_init_is_running);
  67   if (lsan_inited)
  68     return;
  69   lsan_init_is_running = true;
  70   SanitizerToolName = "LeakSanitizer";
  71   CacheBinaryName();
  72   InitializeFlags();
  73   InitCommonLsan();
  74   InitializeAllocator();
  75   InitTlsSize();
  76   InitializeInterceptors();
  77   InitializeThreadRegistry();
  78   u32 tid = ThreadCreate(0, 0, true);
  79   CHECK_EQ(tid, 0);
  80   ThreadStart(tid, GetTid());
  81   SetCurrentThread(tid);
  82
  83   if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
  84     Atexit(DoLeakCheck);
  85
  86   InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
  87
  88   lsan_inited = true;
  89   lsan_init_is_running = false;
  90 }
  91
  92 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
  93 void __sanitizer_print_stack_trace() {
  94   GET_STACK_TRACE_FATAL;
  95   stack.Print();
  96 }